Horizon Fitness T303 User manual

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Horizon Fitness T303 Treadmill Service Manual

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TABLE OF CONTENTS
CHAPTER 1: SERIAL NUMBER LOCATION……………………………………………..…………3
CHAPTER 2: ENGINEERING MODE
2.1 Engineering Mode…………………………………….…………………………………….…….….……..4
2.2 Engineering Mode Overview…………………………………………….…………………………..…….5
CHAPTER 3: ELECTRICAL DIAGRAM
3.1 Electrical Diagram …………………………………………………………………………………….…….6
CHAPTER 4: TROUBLESHOOTING
4.1 Troubleshooting – No Power to the Console ………………………………………………….………....7
4.2 Troubleshooting – Keypads Not Responding……………………………………………………………..9
4.3 Troubleshooting – No Console Response ……………………………………………………....….……10
4.4 Troubleshooting – Incline Motor Issues…………………………..……………………………………….11
4.5 Troubleshooting – Noise Issues ……………………………………………………………..………….…12
4.6 Troubleshooting – Speaker / Audio Issues……………………………………………………………..…14

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CHAPTER 1: SERIAL NUMBER LOCATION
1.1 Serial Number Location

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CHAPTER 2: ENGINEERING MODE
2.1 Engineering Mode
1) To enter Engineering Mode, press & hold the INCLINE UP and SPEED DOWN keys at the same time for
3-5 seconds until Engineering Menu appears on the display.
2) Use the INCLINE or SPEED UP and DOWN keys to scroll through a list of parameters.
3) Press ENTER to enter a parameter setting.
4) Use the INCLINE or SPEED UP and DOWN keys to change the parameter.
5) Press the START key to save the change to the parameter.
6) Press and hold the STOP key to exit Engineering Mode and return to normal operation.

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CHAPTER 2: ENGINEERING MODE
2.2 Engineering Mode – Overview
MODE FUNCTION DESCRIPTION
ENG 0 Display Test Start Key – LCD/LED on
Stop Key – LCD/LED off
Any Other Key - Will show on the display window.
Hold the STOP key for 3 seconds to return to the Engineering Menu.
ENG 1 Hardware Test Motor & Incline Motor Test. Press the START key to get the belt moving
and the SPEED UP or DOWN key to adjust the speed. Press the
INCLINE UP or DOWN keys to test the incline.
ENG 2 Auto Calibration Auto calibrates is not used on this model. Will scroll “No Function”.
ENG 3 Switch Function Use the START key to select unit (MI = Miles or KM = Kilometers).
ENG 4 Information Accumulated Time and Distance
Press and hold the START key for 5 seconds to clear all data.
Unit of Time is Hour.
Unit of Distance is KM or Mile based on your setting in ENG3.
SECOND
LEVEL
ENG 8
Software Version To Get to ENG 8 - Enter into ENG 3, the press and hold the SPEED
DOWN and INCLINE UP keys at the same time for 3-5 seconds.
NOTE: ENG8 contains factory settings and should not be accessed by
the customer unless requested by Horizon Customer Technical
Support.
Press ENTER at P0 – Software version.
Press ENTER at P1 – Select speed up rate (normal or quick).
Press ENTER at P3 - Hold the START key to clear all data.
Press ENTER at P4 – Burn Time on the console.
*Demo Mode – The console will display Figure A after the removal of the safety key; Demo On – 60
seconds after the removal of the safety key, the console will enter into DEMO ON MODE. The LED
and LCD will display in turns (Figure B).
FIGUREA FIGUREB

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CHAPTER 3: ELECTRICAL DIAGRAM
3.1 Electrical Diagram

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CHAPTER 4: TROUBLESHOOTING
4.1 Troubleshooting – No Power to the Console
Symptom：The power switch is in the on position, but the console will not turn on.
Reason：
1. The outlet is not providing the correct power, or the power cord / switch is defective.
2. The power receptacle or power wiring to the MCB is defective.
3. The MCB is defective.
4. The console cable or console is defective.
Solution：
1. Check to see if the power switch is lit. If it is not, try a different outlet.
a. If the power switch still does not light up with a known good outlet, replace the power switch.
2. Check to see if the MCB has power. There is a red power LED on the MCB that should be lit.
3. If the MCB does not have power, check the connection of the power wiring from the power receptacle
to the MCB.
a. Use a multi-meter to measure voltage at AC1 & AC2, AC voltage should be the same as local
standard voltage (110V-240V).
b. If the AC voltage value is standard, replace the MCB as it is defective.

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CHAPTER 4: TROUBLESHOOTING
4.1 Troubleshooting – No Power to the Console – Continued
4. If the MCB does have power, check the connection of the console cable wire at the MCB and UCB.
a. Remove the console cable from the MCB, and use a multi-meter to measure the DC voltage between
the “GND pin” (Pins 4 & 5) and the “+ 15V Pin” (Pins 7 & 8). DC output is normally around 15VDC. If there
is no output, replace the MCB.
b. If output is around 15VDC, check the console cable for pinches or kinks. If any damage is found,
replace the console cable. Disconnect the console cable at the UCB and measure the DC voltage
between the “GND pin” (Pins 4 & 5) and the “+ 15V Pin” (Pins 7 & 8). DC output is normally around
15VDC. If there is no output, replace the console cable.
c. If the console cable connections and voltage are all good, replace the UCB.

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CHAPTER 4: TROUBLESHOOTING
4.2 Troubleshooting – Keypads Not Responding
Symptom：The keypads are not responding when pressed.
Reason：
1. The keypads are defective.
2. The console is defective.
Solution：
1. Press the SPEED DOWN and INCLINE UP keys together for 3 seconds to enter Engineering Mode.
a. Use the SPEED UP or DOWN keys to scroll to ENG0, and press ENTER.
b. Test each of the keypads using Display Test. The console should chime as each key is
pressed.
2. If any keypads are not chiming during Step 1, check the connection of the keypad ribbon cable at the
UCB.
a. Even if the connection appears good, detach the ribbon cable from the UCB, and then
re-attach and retest.
b. Replace the keypads as needed.
3. If the keypads do not resolve the issue, replace the console.

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CHAPTER 4: TROUBLESHOOTING
4.3 Troubleshooting – No Console Response
Symptom：The power is on and the console lights up, but the treadmill does not run when keys are
pressed.
Reason：
1. The keypads are defective.
2. The console is defective.
3. The drive motor is defective.
4. The speed sensor is defective.
5. The MCB is defective.
Solution：
1. Check if the console beeps when all keys are pressed. If not, troubleshoot the keypads as outlined in
Section 4.2.
2. Enter Engineering Mode (See Section 2.1), and scroll to ENG 1 (Hardware Test). Press the ENTER
key and then the START key. The belt should start moving.
a. Press the SPEED UP and DOWN keys, if the speed changes, the console is ok. If the speed does
not change, replace the UCB.
3. Turn off the power switch, and open the upper motor cover. Remove the red & black wires coming
from the motor to the MCB, and use a multi-meter to measure the resistance of the drive motor wire.
a. If the resistance is higher than 10 Ω, the drive motor is defective. Replace the drive motor.
If the resistance is lower than 10 Ω, the drive motor is ok.
4. Check the connection of the speed sensor (encoder disk group) at the MCB (Figure A).
a. Remove the speed sensor from the motor and clean it (Figure B), then re-test.
b. If the speed sensor is clean and has a good connection but still will not operate, replace the speed
sensor.
5. Replace the MCB as the last step if the unit still does not run after taking the above actions.
FIGURE A FIGURE B